Peale, Schuller and others preached a 'positive thinking' message, based loosely on scripture. It avoids most depth theology. It is in essense Protestant modernism, rather free from emphasis on traditional Reformation doctrines. It differs dramatically from evangelical Protestantism and is more in accord with mainline Protestantism (Methodists, Episcopalians, Presbyterians, UCC, Dutch Reformed, etc.).
Okay, I like Osteen generally. I am concerned a bit that he can be a bit deceptive, sort of all things to all people. But his positive message - 'you can do it' - is a major motivating theme to millions who need it. I much prefer it to narrow doctrine or 'give those sinners hell' or 'expect a miracle' themes. Osteen is on the same page as most Americans, Protestant or Catholic, who are not all that concerned with doctrinal or liturgical fine points. Most people need and welcome spiritual and moral support in confronting the woes of life, all the big and little problems that we confront. They want to have a deep faith in God, but as for the deeper theological meaning of the Eucharist or the attributes of Mary or the workings of saints and angels - well, they don't care all that much.
I find myself bored by Stanley because he is so narrow in his theology. This is true of most evangelical preachers I have watched on TV. I find a similar weakness in EWTN. It, too, focuses mainly on believing properly, being in the one true church, viewing the Pope with adulation, and following the precise teachings as defined by the magisterium. I confess that I'm one of those who likes to investigate, question, and even doubt - and not fret about it. I'm convinced that God isn't troubled when we use the brain he gave us, when we feel free to think for ourselves. This, of course, will be denounced as egotism.
I suspect that the Lord is far more open-minded than many religious leaders are. I'm ready to take that risk. Jesus certainly challenged the religious establishment of his day, embraced the Samaritans and others who were wildly 'heretical'. and seemed to emphasize more how we lived than what precise doctrines we accepted. See again those closing verses of Matt. 25. When he was asked how to inherit eternal life, how did he respond? He told the parable of the Good Samaritan. Faith, hope and love, these three - what is the greatest? Love always should be the focus of our Christian religion.